linux-kernel - Re: [PATCH] msdos: add support for large disks

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Date:	Wed, 03 Mar 2010 23:02:03 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Daniel Taylor" <Daniel.Taylor@....com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] msdos: add support for large disks

Andrew Morton <akpm@...ux-foundation.org> writes:

> On Wed, 24 Feb 2010 19:17:47 -0800
> "Daniel Taylor" <Daniel.Taylor@....com> wrote:
>
>> In order to use disks larger than 2TiB on Windows XP, it is necessary to use
>> 4096-byte logical sectors in an MBR.

BTW, you can use GPT instead?

And to make sure, "4096-byte logical sectors in an MBR" is meaning, the
storage must be supporting 4096B and is using it?

>> Although the kernel storage and functions called from msdos.c used
>> "sector_t" internally, msdos.c still used u32 variables, which results in
>> the ability to handle XP-compatible large disks.
>> 
>> This patch changes the internal variables to "sector_t".
>> 
>
> Please Cc OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> and myself on
> this work.

BTW, to make sure, this is fs/partitions/, not fs/fat/. So, I'm not
sure, my knowledge is enough or not, and/or you just missed
fs/partitions/.

Well, I'll make time to check. BTW, basically it sounds good to me
except implementation details. But, I'd like to compare and check other
implement a bit if possible. IIRC, this is not a well defined
specification.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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